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+SO Citrus REST Simulator ![Logo][1]
+================
+
+This is a standalone simulator application for REST messaging.
+
+Clients are able to access the simulator endpoints and the simulator responds with predefined response
+messages according to its scenarios. The simulator response logic is very powerful and enables us to simulate
+any kind of server interface.
+
+Read the simulator [user manual](https://citrusframework.org/citrus-simulator/) for more information.
+
+Message processing
+---------
+
+First of all the simulator identifies the simulator scenario based on a mapping key that is extracted from the incoming request. Based
+on that operation key the respective simulator scenario is executed.
+
+There are multiple ways to identify the simulator scenario from incoming request messages:
+
+* Message-Type: Each request message type (XML root QName) results in a separate simulator scenario
+* REST request mappings: Identifies the scenario based on Http method and resource path on server
+* SOAP Action: Each SOAP action value defines a simulator scenario
+* Message Header: Any SOAP or Http message header value specifies a new simulator scenario
+* XPath payload: An XPath expression is evaluated on the message payload to identify the scenario
+
+Once the simulator scenario is identified the respective test logic builder is executed. The Citrus test logic provides
+proper response messages as a result to the calling client. The response messages can hold dynamic values and the
+simulator is able to perform complex response generating logic. The test logic is built in Java classes that use the Citrus test
+DSL for defining the simulator scenario steps.
+
+Quick start
+---------
+
+You can build the simulator application locally with Maven:
+
+```
+mvn clean install
+```
+
+This will compile and package all resources for you. Also some prepared Citrus integration tests are executed during the build.
+After the successful build you are able to run the simulator with:
+
+```
+mvn spring-boot:run
+```
+
+Open your browser and point to [http://localhost:8080](http://localhost:8080). You will see the simulator user interface with all available scenarios and
+latest activities.
+
+You can execute the Citrus integration tests now in order to get some interaction with the simulator. Open the Maven project in your favorite IDE and
+run the tests with TestNG plugins. You should see the tests calling operations on the simulator in order to receive proper responses. The simulator user interface should track those
+interactions accordingly.
+
+Information
+---------
+
+Read the [user manual](https://citrusframework.org/citrus-simulator/) for detailed instructions and features.
+For more information on Citrus see [citrusframework.org][2], including a complete [reference manual][3].
+
+ [1]: https://citrusframework.org/img/brand-logo.png "Citrus"
+ [2]: https://citrusframework.org
+ [3]: https://citrusframework.org/reference/html/